0MATHEMATICS : CLASS 8TH
TOPIC : QUADRATIC EQUATIONS
PREPARED BY : VIVEK SINGH
TEST : 01
MAX. TIME : 01:00 HRS
- MARKS : 35 MARKS
Q1. A man can row downstream 20km in 2 hours, and upstream 4 km in 2 hours. Find his speed of rowing in still water. Also find the speed of the current. (05 MARKS)
Q2. A man travels 370 km, partly by train and partly by car. If he covers 250Km by train & the rest by car, it takes him 4 hours. But if he travels 130km by train and rest by car, he takes 18 minutes longer. Find the speed of the train and car. (05 MARKS)
Q3. Place A & B are 100 km apart. One car starts from A and another starts from B at the same time. If the cars travel in the same direction at different speeds, they meet in 5 hours. If they travel towards each other they meet in 1 hour. What are the speeds of the 2 cars. ? (05 MARKS)
Q4. 8 men and 12 boys can finish a given work in 5 days, while 6 men and 8 boys can finish the same in 7 days. Find the time taken by 1 men alone and that by 1 boy alone to finish the work. (05 MARKS)
Q5. Solve the following for unknown variables x & y :
- 2/x + 3/y =13 & 5/x-4/y = -2 (03 MARKS)
- 152x – 378y = -74 & -378x + 152y = -604 (03 MARKS)
- 15/(x-y) + 22/(x+y) = 5 & 40/(x-y) + 55/(x+y) = 13 (03 MARKS)
Q6. The students of a class are made to stand in rows. If 4 students are extra in each row, there would be 2 rows less. If 4 students are less in each row, there would be 4 rows more. Find the no. of students in the class.
(06 MARKS)
NOTE : For word problems , write the solution with statements as required.
